/*
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright 2003 Lars Knoll (knoll@kde.org)
 * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */
#ifndef _CSS_cssparser_h_
#define _CSS_cssparser_h_

#include <QtCore/QString>
#include <QtGui/QColor>
#include <QtCore/QVector>
#include <dom/dom_string.h>
#include <misc/htmlnames.h>
#include <wtf/Vector.h>
#include <xml/dom_docimpl.h>

namespace khtml {
  class MediaQuery;
}

namespace DOM {
  class StyleListImpl;
  class CSSStyleSheetImpl;
  class CSSRuleImpl;
  class CSSStyleRuleImpl;
  class DocumentImpl;
  class CSSValueImpl;
  class CSSValueListImpl;
  class CSSPrimitiveValueImpl;
  class CSSStyleDeclarationImpl;
  class CSSFontFaceRuleImpl;
  class CSSProperty;
  class MediaListImpl;
  class CSSSelector;
    

  struct ParseString {
    unsigned short *string;
    int length;
  };

  struct Value;
  class ValueList;

  struct Function {
    ParseString name;
    ValueList *args;
  };

  struct Value {
    int id;
    bool isInt;
    union {
      double fValue;
      int iValue;
      ParseString string;
      struct Function *function;
    };
    enum {
      Operator = 0x100000,
      Function = 0x100001,
      Q_EMS     = 0x100002
    };

    int unit;
  };

  static inline QString qString( const ParseString &ps ) {
    return QString( (QChar *)ps.string, ps.length );
  }
  static inline DOMString domString( const ParseString &ps ) {
    return DOMString( (QChar *)ps.string, ps.length );
  }

  class ValueList {
 public:
 ValueList() : m_current(0) { }
    ~ValueList();
    void addValue(const Value& v) { m_values.append(v); }
    unsigned int size() const { return m_values.size(); }
    Value* current() { return m_current < m_values.size() ? &m_values[m_current] : 0; }
    Value* next() { ++m_current; return current(); }
 private:
    QVector<Value> m_values;
    int m_current;
  };

  class CSSParser
  {
 public:
    CSSParser( bool strictParsing = true );
    ~CSSParser();

    void parseSheet( DOM::CSSStyleSheetImpl *sheet, const DOM::DOMString &string );
    DOM::CSSRuleImpl *parseRule( DOM::CSSStyleSheetImpl *sheet, const DOM::DOMString &string );
    bool parseValue( DOM::CSSStyleDeclarationImpl *decls, int id, const DOM::DOMString &string,
                     bool _important );
    bool parseDeclaration( DOM::CSSStyleDeclarationImpl *decls, const DOM::DOMString &string );
    bool parseMediaQuery(DOM::MediaListImpl* queries, const DOM::DOMString& string);
    QList<DOM::CSSSelector*> parseSelectorList(DOM::DocumentImpl* doc, const DOM::DOMString& string);
    // Returns an empty list on parse error.

    static CSSParser *current() { return currentParser; }

    unsigned int getLocalNameId(const DOMString& str) {
      LocalName localname;
      DOM::DocumentImpl *doc = document();
      if (doc && doc->isHTMLDocument())
        localname = LocalName::fromString(str, khtml::IDS_NormalizeLower);
      else
        localname = LocalName::fromString(str);
      boundLocalNames.append(localname);
      return localname.id();
    }

    DOM::DocumentImpl *document() const;

    unsigned int defaultNamespace();

    void addProperty( int propId, CSSValueImpl *value, bool important );
    bool hasProperties() const { return numParsedProperties > 0; }
    CSSStyleDeclarationImpl *createStyleDeclaration( CSSStyleRuleImpl *rule );
    CSSStyleDeclarationImpl *createFontFaceStyleDeclaration( CSSFontFaceRuleImpl *rule );
    void clearProperties();

    bool parseValue( int propId, bool important );
    bool parseSVGValue( int propId, bool important );
    bool parseShortHand( int propId, const int *properties, int numProperties, bool important );
    bool parse4Values( int propId, const int *properties, bool important );
    bool parseContent( int propId, bool important );

    CSSValueImpl* parseBackgroundColor();
    CSSValueImpl* parseBackgroundImage(bool& didParse);

    enum BackgroundPosKind {
      BgPos_X,
      BgPos_Y,
      BgPos_NonKW,
      BgPos_Center
    };
        
    CSSValueImpl* parseBackgroundPositionXY(BackgroundPosKind& kindOut);
    void parseBackgroundPosition(CSSValueImpl*& value1, CSSValueImpl*& value2);
    CSSValueImpl* parseBackgroundSize();

    bool parseBackgroundProperty(int propId, int& propId1, int& propId2, CSSValueImpl*& retValue1, CSSValueImpl*& retValue2);
    bool parseBackgroundShorthand(bool important);

    void addBackgroundValue(CSSValueImpl*& lval, CSSValueImpl* rval);

    bool parseShape( int propId, bool important );
    bool parseFont(bool important);
    bool parseFontFaceSrc();
    bool parseCounter(int propId, bool increment, bool important);

    bool parseColorParameters(Value*, int* colorValues, bool parseAlpha);
    bool parseHSLParameters(Value*, double* colorValues, bool parseAlpha);

    // returns the found property
    // 0 if nothing found (or ok == false)
    // @param forward if true, it parses the next in the list
    CSSValueListImpl *parseFontFamily();
    CSSPrimitiveValueImpl *parseColor();
    CSSPrimitiveValueImpl *parseColorFromValue(Value* val);
    CSSValueImpl* parseCounterContent(ValueList *args, bool counters);

    // CSS3 Parsing Routines (for properties specific to CSS3)
    bool parseShadow(int propId, bool important);

    // SVG parsing:
    CSSValueImpl* parseSVGStrokeDasharray();
    CSSValueImpl* parseSVGPaint();
    CSSValueImpl* parseSVGColor();
 private:
    // defines units allowed for a certain property, used in parseUnit
    enum Units {
      FUnknown   = 0x0000,
      FInteger   = 0x0001,
      FNumber    = 0x0002,  // Real Numbers
      FPercent   = 0x0004,
      FLength    = 0x0008,
      FAngle     = 0x0010,
      FTime      = 0x0020,
      FFrequency = 0x0040,
      FRelative  = 0x0100,
      FNonNeg    = 0x0200
    };

    bool parseBorderImage(int propId, bool important);
    bool parseBorderRadius(bool important);

    static bool validUnit( Value *value, int unitflags, bool strict );


 public:
    bool strict;
    bool important;
    unsigned int id;
    DOM::StyleListImpl* styleElement;
    mutable DOM::DocumentImpl*  styleDocument; // cached document for styleElement,
    // or manually set one for special parses

    // Outputs for specialized parses. 
    DOM::CSSRuleImpl *rule;
    khtml::MediaQuery* mediaQuery;
    QList<DOM::CSSSelector*> selectors;
	
    ValueList *valueList;
    CSSProperty **parsedProperties;
    int numParsedProperties;
    int maxParsedProperties;

    int m_inParseShorthand;
    int m_currentShorthand;
    bool m_implicitShorthand;
        

    static CSSParser *currentParser;

    // tokenizer methods and data
 public:
    int lex( void *yylval );
    int token() { return yyTok; }
    unsigned short *text( int *length);
    int lex();
 private:
    int yyparse();
    void runParser();
    void setupParser(const char *prefix, const DOMString &string, const char *suffix);

    bool inShorthand() const { return m_inParseShorthand; }

    unsigned short *data;
    unsigned short *yytext;
    unsigned short *yy_c_buf_p;
    unsigned short yy_hold_char;
    int yy_last_accepting_state;
    unsigned short *yy_last_accepting_cpos;
    int block_nesting;
    int yyleng;
    int yyTok;
    int yy_start;
    WTF::Vector<LocalName> boundLocalNames;
  };

} // namespace
#endif
// kate: tab-width 8;

